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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 418 · 40 questions
TalentJR

Engineer's tip (Less force, more distance): MA = load ÷ effort. Work (J) = force (N) × distance (m); force = work ÷ distance; distance = work ÷ force. Ideal ramp: MA = length ÷ height, effort = load ÷ MA.

NameDateTime takenScore ___ / 40
  1. 1.🏋️ A force of 280 N did 1120 J of work. How many metres did the object move?
  2. 2.🏋️ A force of 140 N did 1120 J of work. How many metres did the object move?
  3. 3.🏋️ Pushing a crate 9 m took 4050 J of work. What force was used, in newtons?
  4. 4.🏋️ Work is done when a force moves something … (a) very slowly (b) through a distance (c) without moving it (d) only upwards
  5. 5.🏋️ A machine lifts a load of 1020 N when you push with 170 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ A machine lifts a load of 380 N when you push with 190 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ Pushing a crate 1 m took 100 J of work. What force was used, in newtons?
  8. 8.🏋️ A 20 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  9. 9.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) yes, by half (c) only on Mondays (d) yes, always
  10. 10.🏋️ A force of 120 N pushes a cart 1 m along the floor. How much work is done, in joules?
  11. 11.🏋️ A force of 270 N pushes a cart 1 m along the floor. How much work is done, in joules?
  12. 12.🏋️ A machine lifts a load of 720 N when you push with 120 N. What is its mechanical advantage (MA)?
  13. 13.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 4750 N box up it, in newtons? (ideal ramp, no friction)
  14. 14.🏋️ A force of 400 N did 1200 J of work. How many metres did the object move?
  15. 15.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 1400 N box up it, in newtons? (ideal ramp, no friction)
  16. 16.🏋️ Pushing a crate 3 m took 570 J of work. What force was used, in newtons?
  17. 17.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load × effort (c) load + effort (d) load ÷ effort
  18. 18.🏋️ A machine lifts a load of 400 N when you push with 100 N. What is its mechanical advantage (MA)?
  19. 19.🏋️ Pushing a crate 10 m took 3800 J of work. What force was used, in newtons?
  20. 20.🏋️ A machine lifts a load of 280 N when you push with 70 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ In which unit is work measured? (a) metre (m) (b) newton (N) (c) watt hour (d) joule (J)
  22. 22.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 4000 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ A force of 110 N pushes a cart 1 m along the floor. How much work is done, in joules?
  25. 25.🏋️ A force of 490 N pushes a cart 1 m along the floor. How much work is done, in joules?
  26. 26.🏋️ A machine lifts a load of 90 N when you push with 30 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 100 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ A force of 100 N pushes a cart 3 m along the floor. How much work is done, in joules?
  29. 29.🏋️ Pushing a crate 7 m took 840 J of work. What force was used, in newtons?
  30. 30.🏋️ A machine lifts a load of 400 N when you push with 80 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ A machine lifts a load of 540 N when you push with 90 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ A force of 260 N pushes a cart 4 m along the floor. How much work is done, in joules?
  33. 33.🏋️ A force of 30 N did 210 J of work. How many metres did the object move?
  34. 34.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 3750 N box up it, in newtons? (ideal ramp, no friction)
  35. 35.🏋️ Pushing a crate 4 m took 880 J of work. What force was used, in newtons?
  36. 36.🏋️ A 9 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  37. 37.🏋️ A force of 350 N did 2450 J of work. How many metres did the object move?
  38. 38.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 4200 N box up it, in newtons? (ideal ramp, no friction)
  39. 39.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 1750 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ Pushing a crate 1 m took 360 J of work. What force was used, in newtons?

Answer key

  1. 4
  2. 8
  3. 450
  4. through a distance
  5. 6
  6. 2
  7. 100
  8. 1000
  9. no, work stays the same
  10. 120
  11. 270
  12. 6
  13. 950
  14. 3
  15. 350
  16. 190
  17. load ÷ effort
  18. 4
  19. 380
  20. 4
  21. joule (J)
  22. 1000
  23. 100
  24. 110
  25. 490
  26. 3
  27. 50
  28. 300
  29. 120
  30. 5
  31. 6
  32. 1040
  33. 7
  34. 750
  35. 220
  36. 270
  37. 7
  38. 700
  39. 350
  40. 360

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